13650631661 has 16 divisors (see below), whose sum is σ = 14541120000. Its totient is φ = 12770005248.

The previous prime is 13650631613. The next prime is 13650631663. The reversal of 13650631661 is 16613605631.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 13650631661 - 2¹⁸ = 13650369517 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13650631663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5354015 + ... + 5356563.

It is an arithmetic number, because the mean of its divisors is an integer number (908820000).

Almost surely, 2^13650631661 is an apocalyptic number.

It is an amenable number.

13650631661 is a deficient number, since it is larger than the sum of its proper divisors (890488339).

13650631661 is a wasteful number, since it uses less digits than its factorization.

13650631661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4348.

The product of its (nonzero) digits is 58320, while the sum is 38.

The spelling of 13650631661 in words is "thirteen billion, six hundred fifty million, six hundred thirty-one thousand, six hundred sixty-one".